Title :
Reduced complexity decoding for Bit-Interleaved Coded Multiple Beamforming with Constellation Precoding
Author :
Li, Boyu ; Park, Hong Ju ; Ayanoglu, Ender
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Univ. of California, Irvine, CA, USA
Abstract :
Multiple beamforming is realized by singular value decomposition of the channel matrix which is assumed to be known to both the transmitter and the receiver. Bit-Interleaved Coded Multiple Beamforming (BICMB) can achieve full diversity as long as the code rate Rc and the number of employed subchannels S satisfy the condition RcS ≤ 1. Bit-Interleaved Coded Multiple Beamforming with Constellation Precoding (BICMB-CP), on the other hand, can achieve full diversity without the condition RcS ≤ 1. However, the decoding complexity of BICMB-CP is much higher than BICMB. In this paper, a reduced complexity decoding technique, which is based on Sphere Decoding (SD), is proposed to reduce the complexity of Maximum Likelihood (ML) decoding for BICMB-CP. The decreased complexity decoding achieves several orders of magnitude reduction, in terms of the average number of real multiplications needed to acquire one precoded bit metric, not only with respect to conventional ML decoding, but also, with respect to conventional SD.
Keywords :
MIMO communication; array signal processing; interleaved codes; maximum likelihood decoding; precoding; radio receivers; radio transmitters; singular value decomposition; BICMB-CP; MIMO; bit-interleaved coded multiple beamforming; channel matrix; code rate; constellation precoding; decoding complexity; magnitude reduction; maximum likelihood decoding; receiver; singular value decomposition; sphere decoding; transmitter; Array signal processing; Complexity theory; Interleaved codes; Maximum likelihood decoding; Measurement; Signal to noise ratio; Beamforming; Bit-Interleaved Coded Modulation; Constellation Precoding; Decoding Complexity; MIMO; SD;
Conference_Titel :
Wireless Communications and Mobile Computing Conference (IWCMC), 2011 7th International
Conference_Location :
Istanbul
Print_ISBN :
978-1-4244-9539-9
DOI :
10.1109/IWCMC.2011.5982407